From Brangelina to Will and Kate, the public is obsessed with celebrity relationships. Their breakups, their makeups, their pregnancies and engagements—we want to know everything.

Whether we’re living vicariously through their relationships or just enjoying the view, we’re always curious about what makes A-list couples tick. Hollyscoop talked to relationship expert Rachel A. Sussman, author of The Breakup Bible, and asked her about some of our favorite celebrity couples.

When I think Hollywood power couple, I think Brad Pitt and Angelina Jolie. They make a picture perfect pair, but how do they make it work? Rachel fills us in: “They appear very family oriented—you don’t hear of them at nightclubs or partying too much.” Rachel adds that their secret is: “they seem to work in tandem, and that’s key to any successful partnership.”

And then there was one of the most surprising breakups of 2011, Katy Perry and Russell Brand. The two seemed genuinely happy together, but their personalities couldn’t be more different. Katy, while her music is fun and poppy, has a strict Christian upbringing. Russell is a womanizer with a hard-partying past. But opposites attract, right?

“Although opposites attract, couples who have more in common do better in the long run,” Rachel tells Hollyscoop.

And no one bounces back from breakups better (or quicker!) than celebrities. Case in point, Jennifer Lopez, who started dating her backup dancer, Casper Smart, shortly after announcing her divorce from Marc Anthony.

“I’m not a fan of rebound relationships,” Rachel tells us. “In fact, I think dating before you're emotionally ready after a breakup is a really bad idea. You have to take time when a relationship ends to settle in.”

Rachel adds that rebounding, in the long run, isn’t healthy. So much for ‘the best way to get over someone is to get under someone else.’

“Dating because you're lonely, afraid of the future, bored, or need self-confidence is always a bad idea,” Rachel says. “It's important to take your time and learn how to be alone. That's where the growth and maturity comes from!”